:root {
  --color-bg: #f6f2ec;
  --color-bg-alt: #efe8de;
  --color-ink: #221d18;
  --color-ink-muted: #5c534a;
  --color-accent: #b5502f;
  --color-accent-dark: #8a3c22;
  --color-border: #ddd0bf;
  --color-card-bg: #ffffff;
  --font-body: "Pretendard", system-ui, sans-serif;
  --container-max: 1120px;
  --radius: 10px;
  --ease: cubic-bezier(.22,1,.36,1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-bg);
  word-break: keep-all;
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(246,242,236,.86);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: background .2s var(--ease), border-color .2s var(--ease);
}
.site-header.is-scrolled { background: var(--color-bg); border-bottom-color: var(--color-border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-text { display: flex; flex-direction: column; line-height: 1.25; }
.logo-name { font-weight: 700; font-size: 15px; }
.logo-tagline { font-size: 11px; color: var(--color-ink-muted); }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 11px 20px; border-radius: 999px; font-weight: 700; font-size: 14px; }
.btn-primary { background: var(--color-accent); color: #fff; }
.btn-primary:hover { background: var(--color-accent-dark); }

/* Hero */
.hero {
  padding: 72px 0 56px;
  background: linear-gradient(180deg, var(--color-bg-alt), var(--color-bg));
}
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.eyebrow { font-size: 12px; font-weight: 700; letter-spacing: .08em; color: var(--color-accent); text-transform: uppercase; margin: 0 0 12px; }
.hero h1 { font-size: clamp(30px, 4vw, 44px); margin: 0 0 16px; font-weight: 800; }
.hero-lead { font-size: 17px; color: var(--color-ink-muted); margin: 0 0 24px; }
.hero-photo { border-radius: var(--radius); overflow: hidden; aspect-ratio: 4/3; }
.hero-photo img { width: 100%; height: 100%; object-fit: cover; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.btn-outline { border: 1.5px solid var(--color-ink); padding: 10px 18px; border-radius: 999px; font-weight: 700; font-size: 14px; }

/* Sections */
section { padding: 64px 0; }
.section-alt { background: var(--color-bg-alt); }
.sec-head { max-width: 640px; margin: 0 0 32px; }
.sec-head h2 { font-size: clamp(22px, 3vw, 30px); margin: 0 0 10px; font-weight: 800; }
.sec-head p { color: var(--color-ink-muted); margin: 0; }

/* Cards (WHY / cluster grid) */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: var(--color-card-bg); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 24px; }
.card-num { font-family: monospace; font-size: 12px; color: var(--color-accent); font-weight: 700; margin-bottom: 10px; }
.card h3 { margin: 0 0 8px; font-size: 17px; }
.card p { margin: 0; color: var(--color-ink-muted); font-size: 14.5px; }

/* Cost table (핵심 컴포넌트 — 비용/견적 축) */
.cost-table { width: 100%; border-collapse: collapse; background: var(--color-card-bg); border: 1px solid var(--color-border); border-radius: var(--radius); overflow: hidden; opacity: 0; transform: translateY(16px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.cost-table.is-visible { opacity: 1; transform: none; }
.cost-table th, .cost-table td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--color-border); font-size: 14.5px; }
.cost-table th { background: var(--color-bg-alt); font-weight: 700; }
.cost-table tr:last-child td { border-bottom: none; }

/* Steps */
.step-list { display: grid; gap: 16px; }
.step { display: flex; gap: 16px; align-items: flex-start; background: var(--color-card-bg); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 18px 20px; }
.step-num { font-family: monospace; font-weight: 700; color: var(--color-accent); flex-shrink: 0; width: 28px; }
.step h3 { margin: 0 0 4px; font-size: 15.5px; }
.step p { margin: 0; color: var(--color-ink-muted); font-size: 14px; }

/* Portfolio / gallery */
.portfolio-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.portfolio-grid figure { margin: 0; border-radius: var(--radius); overflow: hidden; opacity: 0; transform: translateY(16px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.portfolio-grid figure.is-visible { opacity: 1; transform: none; }
.portfolio-grid .thumb { aspect-ratio: 4/3; overflow: hidden; }
.portfolio-grid .thumb img { width: 100%; height: 100%; object-fit: cover; }
.portfolio-grid figcaption { padding: 10px 4px; font-size: 13px; color: var(--color-ink-muted); }

/* Related */
.related-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.related-grid a { background: var(--color-card-bg); border: 1px solid var(--color-border); border-radius: var(--radius); overflow: hidden; opacity: 0; transform: translateY(16px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.related-grid a.is-visible { opacity: 1; transform: none; }
.related-grid .thumb { aspect-ratio: 3/4; overflow: hidden; }
.related-grid .thumb img { width: 100%; height: 100%; object-fit: cover; }
.related-grid .rc-title { padding: 10px 12px; font-size: 13.5px; font-weight: 700; }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--color-border); opacity: 0; transform: translateY(12px); transition: opacity .4s var(--ease), transform .4s var(--ease); }
.faq-item.is-visible { opacity: 1; transform: none; }
.faq-q { padding: 18px 4px; font-weight: 700; cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
.faq-plus { color: var(--color-accent); font-weight: 400; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .3s var(--ease); }
.faq-item.is-open .faq-a { max-height: 300px; }
.faq-a p { margin: 0 4px 18px; color: var(--color-ink-muted); font-size: 14.5px; }

/* CTA */
.cta-band { background: var(--color-ink); color: #fff; border-radius: 16px; padding: 48px 40px; text-align: center; }
.cta-band h2 { margin: 0 0 12px; font-size: clamp(20px,3vw,28px); }
.cta-band p { color: #cfc6ba; margin: 0 0 24px; }

/* Footer */
.site-footer { border-top: 1px solid var(--color-border); padding: 40px 0 20px; margin-top: 40px; }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 24px; font-size: 13.5px; color: var(--color-ink-muted); }
.footer-name { font-weight: 700; color: var(--color-ink); margin: 0 0 6px; }
.footer-inner p { margin: 2px 0; }
.footer-links { display: flex; gap: 16px; }
.footer-copy { font-size: 12px; color: var(--color-ink-muted); padding-top: 16px; }

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}